Is CVE-2021-26252 actively exploited?

No active exploitation of CVE-2021-26252 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-26252 be exploited remotely?

No. CVE-2021-26252 requires local access to exploit.

What is the CVSS score of CVE-2021-26252?

CVE-2021-26252 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2021-26252

HIGH

CVE-2021-26252

CWE-787Published: February 24, 2022· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

A flaw was found in htmldoc in v1.9.12. Heap buffer overflow in pspdf_prepare_page(),in ps-pdf.cxx may lead to execute arbitrary code and denial of service.

NVD Source

Technical Analysis

CVE-2021-26252 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.